Earplug



FIG. 1 is a bottom, side perspective view of an earplug thereof;

FIG. 2 is a first side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 3 is a second side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for an earplug, as shown and described. 